Tilt HFD numbers: Analyze vs Tools:ImageInspector:Tilt(F4)

[jk colli]

When I use on the same image the Tools:Image Inspector: Tilt(F4) vs the Stack Menu: Inspector Analyze
I get different results. The top row on Tools:Image Inspector: Tilt(F4) seems to be the bottom rows on
Stack Menu: Inspector Analyze.

Also the numbers are slightly different and the number of stars are different.

I have included the results from Tools:Image Inspector: Tilt(F4) as a screenshot image.

I have included the results from Stack Menu: Inspector Analyze below:
From Stack Menu: Inspector Analyze
File Exposure Temperature Binning Width Height Type Date/Time Star detections FocPos hfd hfd cent hfd out hfd 11 hfd 21 hfd 31 hfd 12 hfd 32 hfd 13 hfd 23 hfd 33 Error Error Error Error Error Error
C:\APT_Images\CameraCCD_1\2024-08-14\QHY258C__Color\Altais\L_2024-08-14_21-35-27_5342_FL400_16s_-5C_G40_OFS50_NBZ_0-5mm_FP22076.fit 16 -5 1 x 1 6252 4176 Light Frame 2024-08-15 04:35:10 486 22076 3.523 3.770 3.422 3.419 3.222 2.962 4.298 3.159 4.968 4.398 3.477

1. Why are the resulting numbers different? Is a different algorithm used?
2. Are the top and bottom rows swapped between the two measurements?
   (Edit: I just realized that I had Flip Vertical checked. )
   Jack
   jkcolli@yahoo.com

[han.k]

The results are slightly influenced by the number of star detection's. For the image inspection you can select more stars via the F5 menu. Both menus use different routines but the results should be similar.

For the viewer you can flip the image. Then the figure it will also rotate. For the inspection tab it is fixed to the FITS coordinates assuming left bottom is pixel position 1,1. If you set in the viewer under menu View no flip then they should have the same orientation.

Cheers, Han